Tubular lighting device

a lighting device and tube technology, applied in the direction of semiconductor devices for light sources, point-like light sources, light and heating apparatus, etc., can solve the problems of negatively affecting people exposed to this type of lighting, and achieve the effect of reducing the angular spread of the lens, and improving the ratio between the diffusing portion and the transparant portion

a lighting device and tube technology, applied in the direction of semiconductor devices for light sources, point-like light sources, light and heating apparatus, etc., can solve the problems of negatively affecting people exposed to this type of lighting, and achieve the effect of reducing the angular spread of the lens, and improving the ratio between the diffusing portion and the transparant portion

US20160109068A1Inactive Publication Date: 2016-04-21SIGNIFY HLDG BV
3 Cites 23 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tubular lighting device
  • Tubular lighting device
  • Tubular lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036]The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and fully convey the scope of the invention to the skilled person. Like reference characters refer to like elements throughout.

[0037]Referring now to the drawings and to FIG. 1 in particular, there is depicted an exploded perspective view of the tubular lighting device 1 comprising a heat sink 3 and a hollow tubular member 7. As is illustrated in FIG. 1, at least one light emitting diode 5, here five light emitting diodes are mounted with a PCB on the heat sink 3. The periphery of the hollow tubular member 7 includes an elongated lens 15 and a light exit surface 9. The light exit surface 9 and the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A tubular lighting device comprising an elongated heat sink (3), at least one light source (5) mounted on the elongated heat sink (3), and an elongated hollow tubular member (7) with a first and a second end arranged along the elongated heat sink (3). The tubular member (7) comprises a lens (15) and a light exit surface (9). The light exit surface is located in front of the lens (15) and the light exit surface (9) have at least one diffusing portion (11) with a transparent portion on each side of each diffusing portion. The at least one diffusing portion (11) covers an area on the light exit surface (9) corresponding to a light distribution of said lens (15) projected on the light exit surface (9), such that all light is directed by said lens (15) onto the at least one diffusing portion (11).

Description

FIELD OF THE INVENTION[0001]The present invention generally relates to a tubular lighting device, and more specifically to a tubular lighting device with improved illumination features for retrofit fluorescent lamp fixtures.BACKGROUND OF THE INVENTION[0002]Today, the interest in developing and improving alternative lighting devices has greatly increased due to the removal of incandescent light bulbs on the market. This has further lead to increased demands on reduced production costs and to increase the performance of the alternative lighting devices. For example, lighting devices with light emitting diodes have several advantages compared to other conventional lighting, including for example high energy efficiency, high light output and long service life. Therefore, light emitting devices have also started to be incorporated into tubular lighting devices, replacing the traditional fluorescent tubes commonly found in offices, and other general places.[0003]However, the use of light ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
21 Apr 2016
Publication
US20160109068A1
IPC
F21K99/00; F21V3/04; F21V29/70; F21V5/04
CPC
F21K9/17; F21V5/043; F21Y2103/003; F21V29/70; F21Y2101/02; F21V3/04; F21S4/28; F21K9/27
Inventors
BOONEKAMP, ERIK PAUL; VAN DELDEN, MARTINUS HERMANUS WILHELMUS MARIA